Probability density distributions of the cosmological parameters Ω_m and w in the PIEMD_Ω_mw (black) and SPEMD_Ω_mw (blue) models. We show the marginalized 1D histograms of each parameter and their joint 2D probability distribution. The vertical dashed lines in the 1D histograms represent the 16th, 50th, and 84th percentiles, while the solid lines in the 2D distributions represent the 0.68, 0.95 and 0.99 contour levels.